Is std::vector copying the objects with a push_back?

Question

After a lot of investigations with valgrind, I\'ve made the conclusion that std::vector makes a copy of an object you want to push_back.

Is that really true ? A vect

Answer 1

std::vector always makes a copy of whatever is being stored in the vector.

If you are keeping a vector of pointers, then it will make a copy of the pointer, but not the instance being to which the pointer is pointing. If you are dealing with large objects, you can (and probably should) always use a vector of pointers. Often, using a vector of smart pointers of an appropriate type is good for safety purposes, since handling object lifetime and memory management can be tricky otherwise.